Dyna-Glo wall heaters are the ideal choice for safe, indoor supplemental heating. This state-of-the-art vent free technology does not require a flue or chimney. These heaters are great for use in your home, cabin or garage. Since these heaters do not require electricity to operate, they make an excellent choice for everyday heating and emergency situations when the power goes out. Using blue flame heating technology, heat is distributed similar to your central home heating system.